package com.zimi.core.security;

import com.google.code.kaptcha.Producer;
import com.zimi.bean.Constants;
import com.zimi.util.CreateImageCode;
import com.zimi.util.ShiroUtils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.apache.shiro.session.Session;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;

@Controller
@Api("验证码")
@RequestMapping("/captcha")
public class ValidateCode {
    private final Producer captchaProducer;

    private final Producer captchaProducerMath;

    @Autowired
    public ValidateCode(Producer captchaProducer, Producer captchaProducerMath) {
        this.captchaProducer = captchaProducer;
        this.captchaProducerMath = captchaProducerMath;
    }

    @ApiOperation("获取验证码")
    @GetMapping(value = "/img")
    public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response) {
        ServletOutputStream out = null;
        try {
            Session session = ShiroUtils.getSession();
            response.setDateHeader("Expires", 0);
            response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
            response.addHeader("Cache-Control", "post-check=0, pre-check=0");
            response.setHeader("Pragma", "no-cache");
            response.setContentType("image/jpeg");

            String type = request.getParameter("type");
            String capStr = null;
            String code = null;
            BufferedImage bi = null;
            if ("math".equals(type))//验证码为算数 8*9 类型
            {
                String capText = captchaProducerMath.createText();
                capStr = capText.substring(0, capText.lastIndexOf("@"));
                code = capText.substring(capText.lastIndexOf("@") + 1);
                bi = captchaProducerMath.createImage(capStr);
            } else if ("char".equals(type))//验证码为 abcd类型
            {
                capStr = code = captchaProducer.createText();
                bi = captchaProducer.createImage(capStr);
            } else {
                capStr = code = captchaProducer.createText();
                bi = captchaProducer.createImage(capStr);
            }
            session.setAttribute(Constants.KAPTCHA_SESSION_KEY, code);
            out = response.getOutputStream();
            ImageIO.write(bi, "jpg", out);
            out.flush();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    @GetMapping("code")
    public void code(HttpServletRequest request, HttpServletResponse response) {
        HttpSession session = request.getSession();

        response.setContentType("image/jpeg");
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Cache-Control", "no-cache");
        response.setDateHeader("Expires", 0);
        CreateImageCode vCode = new CreateImageCode(100, 30, 4, 12);
        session.setAttribute(Constants.KAPTCHA_SESSION_KEY, vCode.getCode());
        ServletOutputStream out = null;
        try {
            out = response.getOutputStream();
            vCode.write(out);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}